diff options
Diffstat (limited to 'net/mac80211/util.c')
| -rw-r--r-- | net/mac80211/util.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 725af7a468d2..3c61060a4d2b 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -3,6 +3,7 @@ * Copyright 2005-2006, Devicescape Software, Inc. * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> + * Copyright 2013-2014 Intel Mobile Communications GmbH * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -1014,6 +1015,31 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, } elems->pwr_constr_elem = pos; break; + case WLAN_EID_CISCO_VENDOR_SPECIFIC: + /* Lots of different options exist, but we only care + * about the Dynamic Transmit Power Control element. + * First check for the Cisco OUI, then for the DTPC + * tag (0x00). + */ + if (elen < 4) { + elem_parse_failed = true; + break; + } + + if (pos[0] != 0x00 || pos[1] != 0x40 || + pos[2] != 0x96 || pos[3] != 0x00) + break; + + if (elen != 6) { + elem_parse_failed = true; + break; + } + + if (calc_crc) + crc = crc32_be(crc, pos - 2, elen + 2); + + elems->cisco_dtpc_elem = pos; + break; case WLAN_EID_TIMEOUT_INTERVAL: if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) elems->timeout_int = (void *)pos; |